Reading machine



Nov. 4, 1941. A. H. DlcKl'NsoN E1' Al. 2,261,542

READING MACHINE Filed Deo. 2l, 1937 9 Sheets-Sheet l l x vEl jroRs' v @faw.

l 11 ws hmSGS 9 Sheets-Sheet 2 A. H. DICKINSON ET AL READING MACHINE Filed Dec.

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ATTORNEY Nov. 4, 1941.

NOV- 4,1941- A. H. DlcKlNsoN ET AL 2,251,542

READING MACHINE FiledvDeo. 2l, 1937 SShe'ets-Sheet 3 i FIG. 4.

TTORNEY Nov. 4, 1941. A. H. DlCKlNsoN ET AL 2,261,542

READING MACHINE ulml ' Nov. 4, 1941.i A. H. DlcKlNsoN ET AL 2,251,542

READING MACHINE 9 Sheets-Sheet 5 Filed Dec. 2l, 1937 FIG. 7.

n1- II- i in Nov. 4, 1941. I A. H. DlcKlNsoN ET AL 2,261,542

READING MACHINE Filed Deo. 2l, 1937 9 Sheets-Sheet 6 F AMPA /F/E 8 l .M m,

-A'TTORNEY Nov. 4,v 1941. A. H. DlcKlNsoN ET AL. 2,261,542

READING MACHINE Filed Dec. 2l,l 1937 9 sheets-sheet 7 FIG. 13.`

ATTORNEY A. H. DICKINSON ET AL READING MACHINE Filed Dec. 21, 1957 9 Sheets-Shet 8 FIG. 14.

A'TTORNEY Nov. 4, 1941. A. 1-1. DlcKlNsoN ETAL. 2,261,542

READING MACHINE Filed Dec. 21, 1957 ssheetS-sneet 9 135 u 574m' ,ffy 15W,

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farm" l foo 142\'m' v 14a-C 139 Y ,W/T'ORNY Patented Nov.v 4, 1941 s PA READING MA Application December 21, 1937; Serial No. 180,980

a' claims.

This invention relates to reading machines adapted to convert legible characterizations into electrical conditions for controlling purposes.

An object of the present invention is to provide a machine controlled by a control record medium having legible character representations of which portions or sections are adapted to control the operation of associated controlled mechanism in the machine in accordance with the various character representations or code marks disposed on the said medium.

Another object of the present invention is to provide a machine controlled by legible printed representations on a record medium having differently positioned characterizing areas or code marks for each representation capable of modifying rays of radiant energy to control associated light responsive mechanism in the machine.

Anotherobject of the present invention is to provide scanning means having control representations disposed thereon to eiect reading or identifying the various character representations to control the associated mechanisms accordingly.

Still another object of the present invention is to convert the control representations or code ferent intervals by modifying rays of light by means of the light controlling areas or sections of the representations.

Still another object is to provide means to read the code marks successively, and to provide means to skip automatically the reading of certain selected character representations.

acters disposed on the control sheet.

Fig. 3 is a developed view of the perforated scanning tape. l

Fig. 4 is a sectional view of the machine along the lines-B of Fig. 1.

Fig. 5 is a detail sectional view of the machine along the lines 5-5 of Fig. 1.

Fig. 6 is a sectional view of the machine along the lines 6-6 of Fig. 1. l '2 Fig. '7 is a sectional View of one type of character manifesting means.

(Cl. 235m-6L11) Fig. 8 is a detail view of the scanning member spacing mechanism.

Fig. 9 is a detail sectional view of the sheet feeding means along the lines @-9 of Fig. 1.

Fig. 10 is a timing chart of the machine.

Fig. 11 is a circuit diagram of the machine.

Fig. 12 shows a known type tabulating card bearing characters having code marks or characterizing portions. i

Fig. 13 is a sectional view of known card feeding means.

Fig. 14 is a plan view of the modiication embodying card feeding and sensing means.

Fig. l5 is a circuit'l diagram for the modification.

General description Referring now to Figs. 1 to 4, the present invention, broadly and briey, comprises a translucent record medium I having different opaque characters 2 disposed thereon, a source of radiant energy such as the light source 3 and a condenser 4 to direct the rays of light to an analyzing position 5, scanning means such as tape 6, provided 4 marks into electrical conditions initiated at difwith differently positioned scanning openings 1 disposed between the record medium and a radiant energy responsive device 8 such as a photo, cell. The record medium is adapted to remain stationary during the scanningV period, while the openings in the said tape are successively positioned or advanced to the analyzing position to modify the rays of light in `accordance with the characters sensed. As is seen from Figs. 2 and 3, the openings 1 of the tape 6 are differentially positioned transversely of the tape and as the` tape is moved with respect to the characters.'

different portions of the character outlines are scanned by each one of the differentially positioned holes and as is obvious from Fig; 2 the entire group of holes 'l incrementally scan the entire character outline. Upon scanning a character having a control or light affecting area positioned-so as to correspond to a particular opening on the scanning tape, the photocell means is actuated by the modied rays of light to operate control elements in accordance with the characters scanned. When correspondence between the control sections of the characters and the control apertures of the scanning tape is effected, the rays of light impinging on the photocell are modified so that a minimum or substantially zero amount of light is impinged thereon to activate the associated amplifying system, thus controlling the operation of the associated control devices.

Upon completion of reading the scanned char- .character representations.

mentioned hereinbefore, may be disposed-on af acter and controlling the associated devices in accordance therewith. the scanning device is advanced to the next character position on the record medium to repeat again the scanning operation to eifect reading o f the scannedl character. `Before continuing with the detailed description of the scanning means, the control record medium will be described.

Record medium j the individual character outlines, so as to be in eifect thickened portions of the legible printed character representations. v are arranged so as to occupy different positions areas and comprise the control sections, io 'f'i'; l'1 el The characters-j'as continuous record .orindividualusheetfsuc I the well known. type "of tabulating-jcard fas'gxep These code markst cy,

25 Aofthe character representationsv so jas-not overlap one another..- The said, markslforg-sec- Y tions 9' form the light aiecting orfrnrnlifyingv ffmitted to' be impinged with full effect on the *photocell. Energization of the photocell by the ord medium maybe translucentlforopaque. TF or' example, in the descriptionto follow, the .main embodiment winbe shown, '.tpemplny-ases lucent record medium-and 'suitables'ensingmeans for effecting reading of 'the i characters .disposed thereon, whereas in the'de'scriptionofainodi'cation of the present inventionfanigopagqu record medium and its related sensingmeans illi:be

shown and described. A

Record guide and feeding means Y Referring now to Fig. 4, one type of record medium or sheet guide and feeding means is shown to comprise a pair of record guide members II disposed so as to permit the record I to be fed therebetween by means of suitable feed rollers l2 and I3. A character analyzing position 5 is provided and is shown to be in the form of apertures or slots I4 formed in the guide members and are extended therein to a length equal t0 the width of the record, so as to expose an entire line of characters disposed on the record.

Associated with the feed rollers I2 is a known type of sheet feeding means and shown in detail in Fig. 9 to comprise a. ratchet wheel I5 secured to the one feed roller shaft I6 and associated pawl mechanism controlled by the line spacing solenoid II. By means of the links I8 operatively connected to the armature I9 of the solenoid and one arm of the bell crank lever 20, the spring pressed pawl 2i, supported by the other arm ofthe bell crank lever 2Il, is operated upon energization of the solenoid I1 to engage the ratchet wheel I5 and rotate the said wheel and feed rollers I2 advancing the record I, thereby presenting the next line of characters disposed thereon to the analyzing position. `A control lever 22 is provided to control the operation of the pawl 2l so that one, two or three line spaces can be enected, upon positioning 0f the lever 22 Analyzing unit Referring now to Figs. 1. 3 and 4. the analyzing unit comprises an endless tape 8 suitably supported and advanced past the analyzing position by a series of sprocket wheels 23. one of which is secured to a driving shaft 24 which is rotated by the drive shaft 25 through the gearing 2iv and 26-a. The scanning tape 6 is shown developed in Fig. 3 and comprises an opaque belt having a series of dinerently positioned openings I to effect reading of the characters disposed on record medium I. 'I'he said openings are positioned on the tape to correspond to and match thedifferently allocated characterizing areas 9 of the character representations on the record. The method of eifecting the reading of the characters on the record will now be evident, since the scanning tape being positioned between the record I and the light responsive means 8, it is seen l that each time an opening 'I on the tape is advancediothe analyzing position, in the event 'thecode mark of the character and the opening are'not in alignment, the rays of light are perlight rays conditions -the associated amplier unit 2I (Fig..1 l.`) fso` that no current flows at that time in its 'output circuit. When an opening is aligned v j with a portion or elemental' area of the character, exclusive of the `code mark, the design and size of the opening with respect to the elemental area are such that a majorA portion of theA light still impinges` upon the photocell. However, when the opening on the tape and the vcharacterizing area or. code mark of the character match or are aligned, the rays of light are modified so that substantially no light rays are impinged on the photocell at that time, thus permitting the amplifier unit to be conditioned so that current flows in the output circuit thereof. In this manner the different characters on the record medium are read or analyzed by the advancing scanning tape to initiate electrical impulses at diierent timed intervals in the scanning cycle. are not as thick as the characterizing areas, it is evident from the statements just set forth that these outlines are not effective to block oi the light rays from the photocells sumciently to render the photocell effective to condition the amplifier unit so as to be conductive. The manner of controlling the associated controlled mechanism by the initiated impulses will be described later herein. However, Ait should be mentioned that the scanning tape 6 is operated in synchronism with the controlled character manifesting or indicating device one type of which 1s indicated generally by the reference character 2l (Fig. 1), by means of the gears 29 interconnecting the scanning unit drive shaft 25 and the.

drive shaft 30 of the said device. The ratio of the different driving gears is arranged so that the scanning tape 6 completes one revolution for every second revolution of the drive shaft 3l. For this reason the scanning tape is provided with two complete sets of openings to analyze the characters. It is noted that between the sets of Vopenings of the tape an imperforate section Since the outlines of the characters is provided which is greater than the imperiorate sections between the scanning openings.

This said 'imperforate section is provided so thatupon completion of the scanning of each character the various functional mechanisms can be operated before the next scanning cycle is initiated, such as positioning the scanning unit to the next character to be read on the record, etc. The means for positioning or advancing the scanning unit successively from character to character in each line will now be described briefly.

Scanning unit positioning means The mechanism to advance the scanning unit so as to scan each character in each line successively and to return the scanning unit upon completion of scanning each line to a position to scan the first character of the next line is shown and described in detail in the said U. S. Patent No. 2,093,545, so that the following brief description is deemed suilicient. Referring to Fig. 4, the described scanning mechanism is enclosed in a suitable housing member 3| secured to grooved bars 32 and 32-a which may be positioned transversely with respect to the stationary grooved bars 33 and 34, due to bearings'supported in the grooves thereof. 'I'he sub-frames 35 also are secured to bars 32 and 32a and are provided to support the tape feed sprockets 23, the photocell unit 8, and the driving shaft 24 for the feed sprockets. The stationary bars 33 and 34 are secured to suitable end plates 36 which are suitably adapted as a support for the driving shaft 25 for the scanning unit which as shown is positioned over the said stationary bars and shaft 25. For this reason the gear 26 interconnecting shafts 24 and 25 must be slidably secured vto shaft 2 5 by means of the key 31.

With reference now to Figs. 6 and 8, the forward advancing means for the scanning unit is shown to be controlled by the magnet 48, and the means for returning the unit to the first character position of each line is shown to be controlled by magnet 4|, both of the said magnets and the associated 'control mechanism are suitably disposed in the housing member 3|. The mechanisms controlled by the magnets 40 and 4| are similar; therefore, only one of the mechanisms need be described to understand the operations thereof.

suitably secured to sleeve 42 connected to gear 26 for movement therewith on shaft 25 is a bevel gear 43 which meshes .with the bevel gear 44 fixed on shaft 45 which has also secured thereto a pinion 46. The said pinion meshes with the idler gear 41, loosely mounted on shaft 48, which in turn meshes with gear 49 secured to shaft |).l Secured to shaft 58 is a driving element 5| which may take the form of a ratchet Wheel,

which obviously is constantly rotated by the d rivingshaft 25 by means of the gearing described. Loosely mounted on shaft 50, adjacent to the driving element 5|, is disc 52, and pivoted thereon is a spring urged driving pawl 53 having a lug or tooth adapted to engage the teeth of the driving element 5|. 'I'he engagement of the said element and pawl is prevented by co-action of an offset lug 54 formed on a pivoted rock lever 55, and a tail 56 of thepawl and an extension lug extending from the disc 52 in the same 'plane as tail 56.

In this manner, the driving element 5|, the associated disc 52 together with pawl 53 constitutes a one-revolution clutch controlled bythe associated magnet 48 acting upon the armature 6| of lthe plate co-act with a curved locking plate 62 secured to one side of the disc 52. The plate 60 and disc 52, with the pin 58 and locking plate 62 constitute irreversible Geneva gearing which has a ratio of one to four, that is, one revolution of the disc causes a quarter of a. revolution of the plate.

The plate 68 is secured to a stud shaft 63 which has a pinion 64 secured 'thereto which meshes with gear 65 loosely mounted on shaft 48. 4Secured to the gear 65 is a bevel gear 66 which meshes with two bevel pinions 61. journaled in a gear 68 loosely mounted on shaft 48. The gear 68 meshes at all times with a rack 69 secured to the upper side of the grooved bar 33 supporting and providing a guide or track for the sensing unit in its movements axially of the record sheet.' A similar bevel gear 66-a meshes with the said pinions 61 and is secured to gear 65-a which meshes with pinion 64-a rotated by plate 68-a and controlled by the associated clutch mechanism and magnet 4|. The gears 65 to 68 constitute` differential gearing, the purpose of which -is to move the scanning unit from left to right and vice-versa under control of the magnets 40 and 4|.

The operation of the described positioning mechanism should be understood and briefly is .as follows: upon energization of magnet 48, the 'lug 54 is moved out of the path of disc 52 and pawl 53, permitting the pawl to engage the ratchet wheel 5| to rotate the disc 52 which by means of pin 58 partially rotates the plate 68, pinion 64, and `differential gearing 65 to 68 to position the housing member and scanning unit one character space, that is, the scanning unit is advanced fromA one character to the adjacent character. For the present description it is assumed that the scanning unit is positioned from left to right as viewed in Fig. 1 upon energization of magnet 48. The energization of magnet 4| causes the associated mechanismto be operated which is similar to the mechanism just described but adapted to rotate the gear 68 in the reverse direction.

A single character spacing is effected if the magnets 40 and 4| 4are deenergized immediately so as to position the lugs 54 in the path of the gated slot-ted bar 10 (Figs. land 4) having a plurality of slots for eachcharacter position 'of the scanning unit, so that, if desired, aplurality of control keys 1I may be inserted in the slots to cooperate with groups of contacts suitably mounted in a stationary housing 12. is provided with one extension 13, the extensions on the keys, however, are not similarly positioned, but arranged so one key is adapted to cooperate with a lever 14 to position the spring blade 15 to close the normally open contacts 16, another key is adapted to cooperate with a simi- Each key inadapteatondmer andindividual aconducting (Hg. l). ments Il in H8.

Il to l! (Fig. 4) individual elongated contact segment members il supported in an insulating member 0| suitably secured to the positionable housing member 3|. neetions are provided for the various control magnets disposed in the said movable housing member and ted with the various control elements controlling the positioning and opera'- tion of the unit. A suitable character The mid conmanifesting or indicating means will now be described. `Accumulating means Referring now to Figs. 1 and 7, a conventional type of accumulating means 2| will be described brieiiy. Thisunitiswellknownintheartand requires no detailed description, however, reference may be made to U. S. Patent No. 1,976,617 for speciilc structural details.

I'he control magnets Ill of the unit may be energized at different timed intervals in the scanning cycle, depending upon the timed interval at which the characterizing areas of each character is detected. Energization of magnet Ill attracts the armature |l| to displace the attached lever |l2 causing the latching member ill slidably molmted on shaft i to engage the member IIS integral with gear lli loosely mounted on shaft III. Gear IIS, when thus coupled to the said shaft, is rotated thereby due to the gearing thereto from the main shaft Il and gears IIC and |I1, and rotation of gear IIC displaces gear Ill positioning the character index wheel Ill.

Therefore, it is understood that, if during the scanning cycle the character 9 is analyzed, the magnet is energized at the nine point in the scanning cycle (see chart-111g. 10) thereby permitting the index wheel to be rotated for the remaining period of the accumulator cycle. It is to be understood that an individual controlling magnet ill is provided for each order of the accumulating means.

Referring to Fig. 11, it is seen that the energization of each order of the said means is controlled by the column or order selector l2 to Il, depending upon the position of the control brushes l2.

As mentioned, upon energizaton of the control magnet ill the associated accumulating means shownandnotin,

isrcndcrcdoperativeandbymcamofthealoeiatedelemmtsismaintoincdoperatlveuniil mdoftheocemnulatorcycleatwhichtime clutchelemmtlllisdeclutbhedbyangell carriedonabar III. Thisoperatknof cmnulatorkwellknownandisexllainedfully intbelastpatentandneedsnofnrtegraltherewitharcrotatablymmmtedonshait 3| and rotated by any suitable meanssuchasbeltlconnectedtomotorlll (Fig. 11). A suitable marmer |22 forthedog |2I,pivotallymountcdthererm,k ilxedlysecuredtoshaftll. Thememberln'and dog l2lhaveprotnldingiingerssmh asindicatcd bythereferencecharacterlandareadaptcd tobeebythestopiwhichisanextmsionofarmaturelnwhenthepartsaremthc positionasshowninthegure.

Whentheclutchmagnet I21isto attract its armature i2., the stop |2I releases thememberlllanddoglusotlmtbymeamof spring|2lthed0siscausedtom8l8etheclutch member |23 which is continuouslyrotatcdtherebyfcaling the shaft 3l to be rotated.

Operation of reading machine' Referring now to Figs. 1, 4 and 11, the operation of the described control elements 0f the machinewillnowbedescribed. Letitbeassumedthattherecordmedium I bearingaplurality of character representations such as shown inFig. 2isinproper horizontal andverim'calrcgistration, and that the scanning unit is in position to start scanning the rst character in the line, and that the control switches |32 are closed to energize the motor ill, the light source 3 and provide the proper potentials for the amplifying unit 21.

Now upon operation of the start key |33 to close its asociated contacts, the circuit to coil of relay i is completed to energize said relay ani close the contacts Ill-a to establish a holdim circuit therefor through the normally closed contactsofthe stopkey |35. Itisseenthatthe magnet |21 is energized as long'as relay I remains energized. Energization of magnet |21 (Figs. 1 and '7) is eifective to release 4pavll |24 toengagethedrivinggear |23 soastorotatethe shafts Il, 25 and 2l advancing the scanning tape i from the normal D position (see Figs, 3 and 10) to present the differently positioned openings thereon successively to the analyzing position. Itistobenotedthataseachopeninginthe tape is scanning the character,` the cam ||5 (Figs. 1, 10 and- 11) isadapted only at such times' to close the associated cam contacts lll, and whenever the openings 1 on the tape, as said openings are presented to the analyzing position, do not correspondto the particular ,positioned characterizing area 9 of the charactexxscanned,

Y the rays of light are permitted to be impinged area of the scanned character the rays of light are prevented from impinging on the photocell, for at this instance the characterizing area and opening on the tape are aligned so as to block' off the source of` light from the photocell, thus conditioning the amplifying unit 21 so that current flows in its output circuit to energize the relay |38. Energization ofsaid relay establishes the following circuit through the contacts |36-a operated thereby: from one terminal of the battery |38-a normally closed contacts' |39-a, conductor |40, contacts |36-a, now closed, to the common conducting segment 83, brushes 82 (which are positioned by the scanning unit, and

I by virtue of its position the brushes are adapted to engage the first contact segment 04-|), contact segment 84-|, plug sockets |4| (when connected in a manner Well known) and the connected control magnet |00 to the other terminal of the battery I38-a, energizing said control magnet. Energization of control magnet |00 is eiective to clutch the elements |03 and |05 to advance the character index Wheel |09 in accordance with the character analyzed. Near the end of the scanning cycle the cam ||4 operates the contacts ||1 to complete the circuit, from conductor |31, through contacts |39-a, contacts |'I1 now closed, brush 88, magnet 40, brush 89 t0 conductor |38 to energize the said magnet momomentarily. Energization of magnet 40 (Figs. 6 and 8) is eiective to release the disc 52, rotating plate 80, pinion B4, gear 85 and the differential gearing 66 to 68 to advance the housing member 3| and scanning unit to the adjacent character on the record medium. Since the magnet 40 is only energizedmomentarily, the disc 52 is blocked by lug 54 upon completion Aof a single rotation,

thus limiting the positioning of the scanning'l unit from the character scanned to the next immediate character. 'I'he machine is now conditioned to scan the second character on the record medium in a manner just described to control the accumulating means accordingly. Positioning the scanning unit is also effective to position the selector brushes 82 to engage the second contact segment 84-2 and condition the circuit to the control magnet of the second order of the accumulating means, to permit this control magnet Ato be energized upon operation of the relay |36. Since the scanning unit is positioned from left to right as viewed in Fig. 1, it is evident that the highest order character is scanned first and entered in the corresponding accumulating order, and the next highest order character is then scanned and entered in the'corresponding order, and so on.

Now, let it be assumed that there are several unprinted columns on the record medium and it .is desired to skip such columns or that it is desired not to scan several columns of the characters appearing on the record and skip these columns. In this event a key 1| (see Figs. 4, 5

to be skipped, and a key having an extension adapted to operate contacts 80 in another one of the slots in bar 10 corresponding to the last column to be skipped.

"I'hen, as the scanning unit is advanced to the said columns desired to be skipped, the-contacts 19 are operated to close the battery circuit to the coil of relay |42, energizing said relay to close contacts |42-a, b and c. A holding circuit is 'established for the said relay by the circuit established from conductor |31, through normally closed contacts 80, contacts |42-a, and coil of saidrelay to conductor |38, maintaining this relay Aenergized until the normally closed contacts are opened by the corresponding key' 1|. By means of the closed contacts |42-c relay |39 is energized to close the contacts |'39-b to establish a holding circuit for said relay through the normally closed cam contacts H6. Energization of relay |39 also causes the normally closed contacts |39-a to be opened at this time opening the control circuit to the control magnets of the accumulating means. The following circuit is established through contacts |42-b, conductor |31, normally closed contacts |43-b, contacts |42-b now closed, brush 80, magnet 40 and brush 89 to conductor |38 to energize magnet 40 and maintain the said magnet energized until l relay |42 is deenergized. A

Under the described conditions, when several columns are desired Ato be skipped, the disc 52 (Fig. 8) is permitted to complete more than one revolution thereby continuously advancing the scanning unit to the last column desired to be skipped. Upon positioning the scanning unit to the said last column, the contacts 80 are opened by the corresponding key 1| to break the holding circuit for relay |42; deenergizing this relay and the magnet 40, thus positioning the scanning unit in the desired position. It is to be noted that the scanning of the characters at this time is not eiective to operate the accumulating means until the beginning of thev scanning cycle or "D position designated in Fig. 10, due to the energized relay |39. Near the end of the scanning cycle the cam ||3 is effective to open the normally closed contacts ||6, breaking the holding circuit for relay |39, deenergizing the relay and conditioning the accumulating control means` control circuit for operation by closing the contacts |'39-a. Analyzation of the characters is now effected as described hereinabove to control the accumulating means accordingly.

and 11) having an extension 13 adapted to operl ate contacts 19 is inserted in one of the slots in bar 10 corresponding to the first column desired Now let it be assumed that a pair of keys 1| are positioned in the slots in the bar 10 corresponding to the first and last columns of characters disposed on the record, so that when the scanning unit has completely scanned the character in the last column, the unit is advanced so that the said key 1| is eilective to close contacts 16 and when the unit is positioned toscan the first column of characters on the record, lthe contacts 18 are opened by the corresponding key 1 Assume that the last character in the line has been scanned and that the unit has been advanced to operate the contacts 16 to energize relay |43 establishing a holding circuit therefor through normally closed contacts 18 and contacts 'H3-a now closed. Since solenoid |1 and magnet 4| are connected in parallel to relay |43,the said solenoid and magnet are energized to effect (1) feeding of the record medium by means of solenoid |1 (Fig. 9) to position thev next line of characters to the sensing position 5, and (2) to return the scanning unit to the first columnar position of the record by means of energized magnet 4| (Fig. 8)

Energized magnet 4I releases disc 62a to rotate plate 66-a, pinion 64-a, gear 66-a and differential gearing 66 to 66 to return thescanning unit to the said columnar position. It is to be noted that while the scanning unit is returned to the first columnar position, contacts |43-b are opened as long as relay |43 is energized, thereby preventing magnet 46 from being energized. and by means of contacts |43-c now closed relay |39 is energized and locked by the circuit established by contacts |36--b now closed. Contacts |36-a are opened due to the energization of relay |39 to open the control circuit to the accumulating means while the unit is being returned as described.

When the first columnar position is reached by the scanning unit, the contacts 16 are opened by means of the positioned key 1| to break the holding circuit to relay |43, deenergizing said relay, solenoid I1 and magnet 4|. thus preventing further movement of the scanning unit. Near the end of the scanning cycle the contacts ||6 are opened to deenergize relay |38 thus conditioning the described circuits sc that the scanning unit is effective to control the accumulating means in accordance with the characters scanned in the said positioned line of characters.

M odifcation Referring now to Figs. 12 to 14. it is shown how the principles of the reading machine described hereinabove can be applied to the known electrical tabulating systems employing the usual and well known tabulating card. A card III of this type is shown in Fig. 12 bearing a plurality of the characters 2 similar to the type of characters described in conjunction with the record medium shown in Fig. 2. The said characters are shown disposed in a line near the top of the card I0. In Fig. 13 the well known card feeding mechanism is shown, which is similar to the one shown in U. S. Patent 1,486,149, and comprises a card picker mechinsm |55 adapted to feed the cards I one by one to the feed rollers |56 by which they are passed through the guide members |51 to the lower rollers |58, and thence passed out into a suitable receptacle |58. 'Ihe card picker mechanism may be operated by suitable v gearing, the rotation of which is controlled by gear |60. The feed rollers |56 and |58 are also rotated by gear |68 by means of the gearing generally indicated by the reference character I6i. A clutch similar to the type described (comprising in part elements |23 to |28) in connectionwith the accumulator mechanism and shown in Fig. 7 is employed to control the rotation of gear |68 by the rotating shaft |6| which in turn may be operated by means of suitable `gearing |62 by the shaft 30. Upon energization 'niewdmneminponuonmmtumum of legible printed characters appearing on the sources or light m are provided with man.

condensers |1| to direct the rays of light to the analyzln'gpositionsothattheimagesofthe character 'representations appearing on the tabulating card are projected cn the scanning tape of the scanning unit. The method of scanning the characters is exactly as described hereinabove and the manner of controlling the associated of control magnet |63 the pawl |64 and supporti ing member |65 are released, permitting the pawl to engage the continuously rotating notched collar |66 to drive the gear |68 secured to member |65 in unison with the driving member |66 and shaft |6|. Magnet |63 is energized momentarily and thus is effective to declutch the said operating elements upon completion of a single revolution of the clutch mechanism. During this single cycle the card feeding mechanism is operated to feed a single card to the feed rollers |56 and |58 to be held there in position by the said rollers during the scanning cycle.

accumulator mechanism is similar to that described.

The only change required in the circuit diagramshowninFig.llistoreplacethelinespac ing solenoid I1 by the card feeding control magnet |63 (see Fig. 15) and associated control relays which will now be described. Upon completion of the analyzation of a line of characters on the record card, the scanning unit is returned in the same manner, as described hereinabove. to the normal starting character position by means of the control magnet 4| and at the same time the control magnet |63 is energized through the normally closed contacts |12-b to operate the card feeding mechanism to present another card to the scanning unit. 'I'he relay |12 is adapted to be energized shortly after the energization of control magnet |63 to deenergize the said magnet. Contacts |14 are controlled by the cam |13 suitably secured to gear |66 which is released by theclutch magnet |63 and are adapted to close the contacts |14 before the end of the card feeding cycle (see Fig. l0) to energize relay |12 through the normally closed contacts 16 and contacts |14 now closed, and establish a holding circuit for the said relay through contacts 1I and |12- a now closed maintaining relay |12 en ergized until the scanning unit is returned to the first character position, when, as described before, the contacts 18 are opened to restore the conditioned relay |12 to normal. While the said relay remains energized. contacts |12-b are opened to break the circuit to control magnet |63 deenergizing said magnet thus preventing the card feeding means to advance more than one card to the analyzing position before scanning of the next presented line of characters is initiated.

In this manner the characters on the tabulatingv card having characterizing sections -are .scanned successively and the said sections of the characters are effective to modify the rays of iight when the characterizing sections and perforate sections of the scanning tape are in alignment or correspondence to condition the light responsive means ad associated control'elements to control the accumulating means in accordance wtih the characters analyzed.

The record -control means herein described as operating in conjunction with the reading means forms the subject matter of copending application filed December 2l, 1937, Ser. No. 180,981.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention therefore to be limited only as indicated by the scope of the following claims.

What is claimed is as follows:

1. A machine of the character described controlled by a record, bearing legible characters, each diierent character having a legible character outline and a single identifying code mark in a different index point position, each character outline and a code mark being conjoined, comprising a scanning means for completely incrementally scanning any one oi' the characters and including a light source for illuminating a character, light responsive means, a scanning member having a plurality of light transmitting sections, the configurations of each of said sections conforming to that of said code marks and being differentially positioned in accordance with said code, said member being interposed between -said record and light responsive means to control the amount of light impinging upon said responsive means, means Vfor cyclically moving said member for scanning successively all portions of said one character during predetermined cycles,

the amount of light impinging upon said respon-A sive means being greatly modified only upon coincidence of a section and an identifying code mark; means controlled by said light responsive means upon such coincidence'for initiating impulses at differential times in a cycle, and differentially settable means operative in synchronism with said moving means and controlled by said impulse initiating means whereby said differentially settable means is set in accordance with the respective identity of the character scanned.

2. The invention set forth in claim 1, in which said scanning member comprises an endless ilexible member bearing said plurality of light transmitting sections.

3. The invention set forth in claim 1, in which the scanning member comprises an opaque endless ilexible tape, said light transmitting sections comprising a plurality of apertures, which apertures are located at different vertical positions on the tape, and at equally spaced horizontal positions lengthwise on-the tape in accordance with said code. v

, ARTHUR H. DICEZNSON.

JOHN N. WHEELER. 

